Deckle



Feb. 11, 1930. c. LOWE 1346,434-

' DECKLE Original Filed March 28, 1928 4 Sheets-Sheet l Feb. 11, 1930.c, LOWE 1,746,434

DEGKLE Original FiledMarch 28, 1928 4 Sheets-Sheet 2 izaz hajalfle C.LOWE DECKLE Feb. 11, 1936;.

@btowsmgo m Feb. 11, 1930. c, LQWE 1,746,434

DECKLE OriginaLFiled March 28, 1928 4 Sheets-Shet 4 atent e e, IT, 193

' CHIEFS LOWE, F BLOOMSJB'URY, NEW JERSEY ioncnn application filed Marchat, 1923, Serial No. 265,339. Renewed December it, rate,

This invention aims to provide'useful and novel improvements in cylinderpaper-mak- .ing machines whereby a perfect couching of the paper-pulpwill be brought aboutand whereby waste and loss of pulp are entirelyprevented, it being possible to adjust the deckles readily for anydesired width of paper, while the machine is in motion.

lit is within the province of the disclosure to improve generally and toenhance the utility of devices of that-type to which the i inventionappertains.

With the above and other objects in View,

which will appear as the description pro ceeds, the invention resides inthe combination and arrangement of parts and in the detalls ofconstruction hereinafter described and claimed, it being understood thatchanges in the precise embodiment of the invention herein disclosed, maybe made within the scope of,

what is claimed, without departing from the spiritgof the invention. 1

In the accompanying drawings Figure 1 is a plan of a vat and cylindermold having the improvements applied;

Figure 2 is a longitudinal section of the structure shown in Figure 1Figure 3 is an end elevation attendant parts;

Figure a is a longitudinal section of the deckling device;

'Figure 5 is a transverse section on the line of the vat ad 5,-5 ofFigure 4:;

Figure 6 is a transverse section on the line 6--6 of Figure 4. p

In Figure 2, the numeral 1 designates the vats of fa cylinderpaper-making machine. The cylinder molds 2 rotate in the vats 1, in thedirection indicated by the arrows. The vats are charged with a solutionof paper stock embodying approximately 99 water and 72; stock. Thispaper-solutions enters through the feed pipe 5, under constant pressure,and flows continuously into the compartment 6 of each vat l, thenceupwardly about the baflles 7, andinto the inner compartment 8, in whichthe cylinder mold2'rotates. The cylinder mold 2 embodies a 'shell 32,made'of wire screen. The wire screen 32 acts as a filter. Much of thewater passes and inside of the mold at 34:. The paper stock inthecompartment 8, adheres to the screen 32 and forms a sheet of paper 9,which is couched or picked 0d the screen 32 by the cylinder web or felt12, through the medium of couchers 3,- and is one ply paper at 13,two-ply at 14:, and three-ply at 15, the paper then passing over thepaper machine in the usual manner. The stock that is not held on thewire screen 32 by suction produced by the diflference in elevation at 33and 3%, passes over at the point 35 into the compartment 1'? and throughthe pipe 18, back to the original source of supply (not shown), whenceit is re-circulated with fresh paper stock through inlet 5.,

' The plies of paper 13, 14c and'l5 must be lined up in such a way as toproduce a selvage edge, each ply after the ply 13 becoming progressivelywider. This selvage edge is known, to those skilled in the art, as thedeckle edge. Heretofore it has been the practice ofpaper makers to winddeckle webbing-around the molds 2 to produce this selchange in the Widthof the paper 9, that is forming on the wire screen 32. Moreover, thecouching of the paper 9 by the, felt 12 and the coucher 3 is imperfect,because of the fact that the deckle webbing wound round the cylindermold 2 prevents the felt 12 from making close contact with the paper 9,and

very decidedly decreases the lifting'effect of couchers 3.

To overcome these difllculties, there is proweight and thickness, due tothe gradual 9 vided the deckling device as shown in detail in Figures 4,5 and 6. In these figures, a piece of brass pipe 23 overhangs each sideof the vat and is fed with water through inlet 21 and elbow 22. The pipeor conduit 23 has a machined slot 29- of accurate dimensions throughoutthe major part of its length. In the slot 29 is located one end of anarcuate cleaning device 30 which slides back and forth on a guide rod 31carried by the pipe 23. An operating rod 36 is connected to the cleaningdevice 30 and slides in a guide ear 50 on the elbow 22. A set screw 51in the ear 50 holds the rod 36 in adjusted positions. The member 30 isused to keep the slot 29 clean, so that it will discharge a solid sheetof water against the screen 32. In the end of elbow 22 is a packing box26 through which slides a piston rod 24. On the exposed end of thepiston rod 24 is an operating handle 25. On the inner end of the rod 24;is a piston head 27 secured in place by threads 52 and locking nuts 28.The pipe 23 is kept full of water at high pressure. By changing theposition of the piston 27, the sheet of water flowing through the slot29 can be varied .in width.

This sheet of water washes ofl end portions of the wire screen 32, allpaper stock that has formed in its path. The stock thus washed ofl,joins the stock which is not fastened to the wire screen 32 by theinfluence of suction produced by difference in elevation at 33 and 34,and passes over at 35 into compartment 17, whence it flows through thepipe 18 back to the original source of supply (not shown) and isre-circulated with fresh paper stock through inlet 5.

With the deckling device described above, it is possible to change thewidths of the plies 13, 14 and 15', by simply changing position of thepistons 27 in the pipes 23, a very quick change of width thus beingefiected.

What is claimed is:

In a paper-making machine, a cylinder, and deckling mechanism includinga liquid conduit having an outlet in the form of a continuouslongitudinal slot discharging on the cylinder at a point adjacent to theend of the cylinder, a piston slidable in the conduit and constitutingmeans for varying the effective discharge length of the outlet slot, acleaner mounted to reciprocate in the slot fromone end of the slot tothe other, and means for operating the cleaner from a point external tothe cylinder whereby the cleaner may be reciprocated .in the slot, thepiston corresponding in cross sectional area to the internal crosssectional area of the cylinder.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature.

CHARLES LOWE.

